TY - JOUR
AU1 - Kim, Sin-Woong
AU2 - Lee, Sung-Chan
AU3 - Kim, Min-Soo
AU4 - Jeong, Soon-Jong
AU5 - Kim, In-Sung
AU6 - Song, Jae-Sung
AB - Abstract Through the low-temperature sintering method, a sintered body with excellent characteristics was produced in an eco-friendly niobate-based piezoelectric ceramic, whose application was low in expectation due to poor sinterability. Li2CO3 was added in excess to (Na0.49K0.45Li0.06)NbO3, and ceramics were manufactured using a commercial sintering method. Then, the sinterability and the piezoelectric properties of the specimens containing varying amounts of Li2CO3 were investigated. The microstructure demonstrated the typical abnormal grain growth tendencies with the addition of Li2CO3, and this was explained through changes in the critical driving force in the interface reaction-controlled nucleation and growth theory. When the specimen had been sintered at 1000 °C for 4 hours in air after the addition of 1.5 mol% Li2CO3, the sintered body showed outstanding characteristics with a piezoelectric coefficient of 180 pC/N, an electromechanical coupling coefficient of 0.32, and a dielectric constant of 975. These results showed that eco-friendly niobate-based ceramics, whose use in applications was expected to be difficult in spite of their excellent properties, could be used to produce piezoelectric materials with outstanding properties through a commercial low-temperature sintering method using additives.
TI - Phase structure and piezoelectric properties of Li-modified NKLN lead-free piezoelectric ceramics
JF - "Journal of the Korean Physical Society"
DO - 10.3938/jkps.61.891
DA - 2012-09-01
UR - https://www.deepdyve.com/lp/springer-journals/phase-structure-and-piezoelectric-properties-of-li-modified-nkln-lead-IBmMOST0Yu
SP - 891
EP - 894
VL - 61
IS - 6
DP - DeepDyve
ER -